diff --git a/src/core/components/content-type.jsx b/src/core/components/content-type.jsx
index 6129d46d..22531c75 100644
--- a/src/core/components/content-type.jsx
+++ b/src/core/components/content-type.jsx
@@ -8,7 +8,9 @@ const noop = ()=>{}
 export default class ContentType extends React.Component {
 
   static propTypes = {
+    ariaControls: PropTypes.string,
     contentTypes: PropTypes.oneOfType([ImPropTypes.list, ImPropTypes.set, ImPropTypes.seq]),
+    controlId: PropTypes.string,
     value: PropTypes.string,
     onChange: PropTypes.func,
     className: PropTypes.string,
@@ -41,14 +43,14 @@ export default class ContentType extends React.Component {
   onChangeWrapper = e => this.props.onChange(e.target.value)
 
   render() {
-    let { contentTypes, className, value, ariaLabel } = this.props
+    let { ariaControls, ariaLabel, className, contentTypes, controlId, value } = this.props
 
     if ( !contentTypes || !contentTypes.size )
       return null
 
     return (
       <div className={ "content-type-wrapper " + ( className || "" ) }>
-        <select className="content-type" aria-label={ariaLabel} value={value || ""} onChange={this.onChangeWrapper} >
+        <select aria-controls={ariaControls} aria-label={ariaLabel} className="content-type" id={controlId} onChange={this.onChangeWrapper} value={value || ""} >
           { contentTypes.map( (val) => {
             return <option key={ val } value={ val }>{ val }</option>
           }).toArray()}
diff --git a/src/core/components/model-collapse.jsx b/src/core/components/model-collapse.jsx
index ef533bd4..97858084 100644
--- a/src/core/components/model-collapse.jsx
+++ b/src/core/components/model-collapse.jsx
@@ -86,15 +86,13 @@ export default class ModelCollapse extends Component {
 
     return (
       <span className={classes || ""} ref={this.onLoad}>
-        { title && <span onClick={this.toggleCollapsed} className="pointer">{title}</span> }
-        <span onClick={ this.toggleCollapsed } className="pointer">
+        <button aria-expanded={this.state.expanded} className="model-box-control" onClick={this.toggleCollapsed}>
+          { title && <span className="pointer">{title}</span> }
           <span className={ "model-toggle" + ( this.state.expanded ? "" : " collapsed" ) }></span>
-        </span>
-        {
-          this.state.expanded
-            ? this.props.children
-            : <span onClick={this.toggleCollapsed} className="pointer">{this.state.collapsedContent}</span>
-        }
+          { !this.state.expanded && <span>{this.state.collapsedContent}</span> }
+        </button>
+
+        { this.state.expanded && this.props.children }
       </span>
     )
   }
diff --git a/src/core/components/models.jsx b/src/core/components/models.jsx
index 2058b05b..e7a93f8b 100644
--- a/src/core/components/models.jsx
+++ b/src/core/components/models.jsx
@@ -58,11 +58,17 @@ export default class Models extends Component {
     const JumpToPath = getComponent("JumpToPath")
 
     return <section className={ showModels ? "models is-open" : "models"} ref={this.onLoadModels}>
-      <h4 onClick={() => layoutActions.show(specPathBase, !showModels)}>
-        <span>{isOAS3 ? "Schemas" : "Models" }</span>
-        <svg width="20" height="20">
-          <use xlinkHref={showModels ? "#large-arrow-down" : "#large-arrow"} />
-        </svg>
+      <h4>
+        <button
+          aria-expanded={showModels}
+          className="models-control"
+          onClick={() => layoutActions.show(specPathBase, !showModels)}
+        >
+          <span>{isOAS3 ? "Schemas" : "Models"}</span>
+          <svg width="20" height="20" aria-hidden="true" focusable="false">
+            <use xlinkHref={showModels ? "#large-arrow-up" : "#large-arrow-down"} />
+          </svg>
+        </button>
       </h4>
       <Collapse isOpened={showModels}>
         {
diff --git a/src/core/components/operation-summary.jsx b/src/core/components/operation-summary.jsx
index 8896f0d7..bdfafe7d 100644
--- a/src/core/components/operation-summary.jsx
+++ b/src/core/components/operation-summary.jsx
@@ -10,6 +10,7 @@ export default class OperationSummary extends PureComponent {
   static propTypes = {
     specPath: ImPropTypes.list.isRequired,
     operationProps: PropTypes.instanceOf(Iterable).isRequired,
+    isShown: PropTypes.bool.isRequired,
     toggleShown: PropTypes.func.isRequired,
     getComponent: PropTypes.func.isRequired,
     getConfigs: PropTypes.func.isRequired,
@@ -26,6 +27,7 @@ export default class OperationSummary extends PureComponent {
   render() {
 
     let {
+      isShown,
       toggleShown,
       getComponent,
       authActions,
@@ -40,6 +42,7 @@ export default class OperationSummary extends PureComponent {
       method,
       op,
       showSummary,
+      path,
       operationId,
       originalOperationId,
       displayOperationId,
@@ -60,17 +63,28 @@ export default class OperationSummary extends PureComponent {
     const securityIsOptional = hasSecurity && security.size === 1 && security.first().isEmpty()
     const allowAnonymous = !hasSecurity || securityIsOptional
     return (
-      <div className={`opblock-summary opblock-summary-${method}`} onClick={toggleShown} >
-        <OperationSummaryMethod method={method} />
-        <OperationSummaryPath getComponent={getComponent} operationProps={operationProps} specPath={specPath} />
+      <div className={`opblock-summary opblock-summary-${method}`} >
+        <button
+          aria-label={`${method} ${path.replace(/\//g, "\u200b/")}`}
+          aria-expanded={isShown}
+          className="opblock-summary-control"
+          onClick={toggleShown}
+        >
+          <OperationSummaryMethod method={method} />
+          <OperationSummaryPath getComponent={getComponent} operationProps={operationProps} specPath={specPath} />
 
-        {!showSummary ? null :
-          <div className="opblock-summary-description">
-            {toString(resolvedSummary || summary)}
-          </div>
-        }
+          {!showSummary ? null :
+            <div className="opblock-summary-description">
+              {toString(resolvedSummary || summary)}
+            </div>
+          }
 
-        {displayOperationId && (originalOperationId || operationId) ? <span className="opblock-summary-operation-id">{originalOperationId || operationId}</span> : null}
+          {displayOperationId && (originalOperationId || operationId) ? <span className="opblock-summary-operation-id">{originalOperationId || operationId}</span> : null}
+
+          <svg className="arrow" width="20" height="20" aria-hidden="true" focusable="false">
+            <use href={isShown ? "#large-arrow-up" : "#large-arrow-down"} xlinkHref={isShown ? "#large-arrow-up" : "#large-arrow-down"} />
+          </svg>
+        </button>
 
         {
           allowAnonymous ? null :
diff --git a/src/core/components/operation-tag.jsx b/src/core/components/operation-tag.jsx
index 7eb89de7..da2edb12 100644
--- a/src/core/components/operation-tag.jsx
+++ b/src/core/components/operation-tag.jsx
@@ -70,7 +70,7 @@ export default class OperationTag extends React.Component {
     return (
       <div className={showTag ? "opblock-tag-section is-open" : "opblock-tag-section"} >
 
-        <h4
+        <h3
           onClick={() => layoutActions.show(isShownKey, !showTag)}
           className={!tagDescription ? "opblock-tag no-desc" : "opblock-tag" }
           id={isShownKey.map(v => escapeDeepLinkPath(v)).join("-")}
@@ -105,15 +105,16 @@ export default class OperationTag extends React.Component {
             </div>
 
             <button
+              aria-expanded={showTag}
               className="expand-operation"
               title={showTag ? "Collapse operation": "Expand operation"}
               onClick={() => layoutActions.show(isShownKey, !showTag)}>
 
-              <svg className="arrow" width="20" height="20">
-                <use href={showTag ? "#large-arrow-down" : "#large-arrow"} xlinkHref={showTag ? "#large-arrow-down" : "#large-arrow"} />
+              <svg className="arrow" width="20" height="20" aria-hidden="true" focusable="false">
+                <use href={showTag ? "#large-arrow-up" : "#large-arrow-down"} xlinkHref={showTag ? "#large-arrow-up" : "#large-arrow-down"} />
               </svg>
             </button>
-        </h4>
+        </h3>
 
         <Collapse isOpened={showTag}>
           {children}
diff --git a/src/core/components/operation.jsx b/src/core/components/operation.jsx
index 5fd8dc16..f5a799d9 100644
--- a/src/core/components/operation.jsx
+++ b/src/core/components/operation.jsx
@@ -114,7 +114,7 @@ export default class Operation extends PureComponent {
 
     return (
         <div className={deprecated ? "opblock opblock-deprecated" : isShown ? `opblock opblock-${method} is-open` : `opblock opblock-${method}`} id={escapeDeepLinkPath(isShownKey.join("-"))} >
-        <OperationSummary operationProps={operationProps} toggleShown={toggleShown} getComponent={getComponent} authActions={authActions} authSelectors={authSelectors} specPath={specPath} />
+          <OperationSummary operationProps={operationProps} isShown={isShown} toggleShown={toggleShown} getComponent={getComponent} authActions={authActions} authSelectors={authSelectors} specPath={specPath} />
           <Collapse isOpened={isShown}>
             <div className="opblock-body">
               { (operation && operation.size) || operation === null ? null :
diff --git a/src/core/components/responses.jsx b/src/core/components/responses.jsx
index df479da0..8b73582c 100644
--- a/src/core/components/responses.jsx
+++ b/src/core/components/responses.jsx
@@ -3,6 +3,7 @@ import { fromJS, Iterable } from "immutable"
 import PropTypes from "prop-types"
 import ImPropTypes from "react-immutable-proptypes"
 import { defaultStatusCode, getAcceptControllingResponse } from "core/utils"
+import createHtmlReadyId from "../../helpers/create-html-ready-id"
 
 export default class Responses extends React.Component {
   static propTypes = {
@@ -86,17 +87,22 @@ export default class Responses extends React.Component {
     const acceptControllingResponse = isSpecOAS3 ?
       getAcceptControllingResponse(responses) : null
 
+    const regionId = createHtmlReadyId(`${method}${path}_responses`)
+    const controlId = `${regionId}_select`
+
     return (
       <div className="responses-wrapper">
         <div className="opblock-section-header">
           <h4>Responses</h4>
-            { specSelectors.isOAS3() ? null : <label>
+            { specSelectors.isOAS3() ? null : <label htmlFor={controlId}>
               <span>Response content type</span>
               <ContentType value={producesValue}
-                         onChange={this.onChangeProducesWrapper}
-                         contentTypes={produces}
+                         ariaControls={regionId}
+                         ariaLabel="Response content type"
                          className="execute-content-type"
-                         ariaLabel="Response content type" />
+                         contentTypes={produces}
+                         controlId={controlId}
+                         onChange={this.onChangeProducesWrapper} />
                      </label> }
         </div>
         <div className="responses-inner">
@@ -115,7 +121,7 @@ export default class Responses extends React.Component {
 
           }
 
-          <table className="responses-table">
+          <table aria-live="polite" className="responses-table" id={regionId} role="region">
             <thead>
               <tr className="responses-header">
                 <td className="col_header response-col_status">Code</td>
diff --git a/src/core/components/svg-assets.jsx b/src/core/components/svg-assets.jsx
index ca1c13ba..9db9517d 100644
--- a/src/core/components/svg-assets.jsx
+++ b/src/core/components/svg-assets.jsx
@@ -23,6 +23,9 @@ const SvgAssets = () =>
           <path d="M17.418 6.109c.272-.268.709-.268.979 0s.271.701 0 .969l-7.908 7.83c-.27.268-.707.268-.979 0l-7.908-7.83c-.27-.268-.27-.701 0-.969.271-.268.709-.268.979 0L10 13.25l7.418-7.141z"/>
         </symbol>
 
+        <symbol viewBox="0 0 20 20" id="large-arrow-up">
+          <path d="M 17.418 14.908 C 17.69 15.176 18.127 15.176 18.397 14.908 C 18.667 14.64 18.668 14.207 18.397 13.939 L 10.489 6.109 C 10.219 5.841 9.782 5.841 9.51 6.109 L 1.602 13.939 C 1.332 14.207 1.332 14.64 1.602 14.908 C 1.873 15.176 2.311 15.176 2.581 14.908 L 10 7.767 L 17.418 14.908 Z"/>
+        </symbol>
 
         <symbol viewBox="0 0 24 24" id="jump-to">
           <path d="M19 7v4H5.83l3.58-3.59L8 6l-6 6 6 6 1.41-1.41L5.83 13H21V7z"/>
diff --git a/src/helpers/create-html-ready-id.js b/src/helpers/create-html-ready-id.js
new file mode 100644
index 00000000..0aa7c9ee
--- /dev/null
+++ b/src/helpers/create-html-ready-id.js
@@ -0,0 +1,10 @@
+/**
+ * Replace invalid characters from a string to create an html-ready ID
+ *
+ * @param {string} id A string that may contain invalid characters for the HTML ID attribute
+ * @param {string} [replacement=_] The string to replace invalid characters with; "_" by default
+ * @return {string} Information about the parameter schema
+ */
+export default function createHtmlReadyId(id, replacement = "_") {
+  return id.replace(/[^\w-]/g, replacement)
+}
diff --git a/src/style/_buttons.scss b/src/style/_buttons.scss
index fd14989e..989ba22d 100644
--- a/src/style/_buttons.scss
+++ b/src/style/_buttons.scss
@@ -110,6 +110,21 @@
     }
 }
 
+.opblock-summary-control,
+.models-control,
+.model-box-control
+{
+  all: inherit;
+  flex: 1;
+  border-bottom: 0;
+  padding: 0;
+  cursor: pointer;
+
+  &:focus {
+    outline: auto;
+  }
+}
+
 .expand-methods,
 .expand-operation
 {
@@ -143,11 +158,9 @@
     }
 }
 
-
 button
 {
     cursor: pointer;
-    outline: none;
 
     &.invalid
     {
diff --git a/test/e2e-cypress/tests/features/model-collapse.js b/test/e2e-cypress/tests/features/model-collapse.js
index c0b0d4f0..bc027257 100644
--- a/test/e2e-cypress/tests/features/model-collapse.js
+++ b/test/e2e-cypress/tests/features/model-collapse.js
@@ -18,16 +18,16 @@ function ModelCollapseTest(baseUrl, urlFragment) {
     .get("#model-Pet")
     .should("exist")
   })
-  
+
   it("Models section should collapse and expand when toggled", () => {
     cy.visit(baseUrl)
-    .get(".models h4")
+    .get(".models h4 .models-control")
     .click()
     .get(".models")
     .should("not.have.class", "is-open")
     .get("#model-Order")
     .should("not.exist")
-    .get(".models h4")
+    .get(".models h4 .models-control")
     .click()
     .get(".models")
     .should("have.class", "is-open")
@@ -35,28 +35,15 @@ function ModelCollapseTest(baseUrl, urlFragment) {
     .should("exist")
   })
 
-  it("Model should collapse and expand when toggled clicking title", () => {
+  it("Model should collapse and expand when toggled clicking button", () => {
     cy.visit(baseUrl)
-    .get("#model-User .model-box .pointer:nth-child(1)")
+    .get("#model-User .model-box .model-box-control")
     .click()
     .get("#model-User .model-box .model .inner-object")
     .should("exist")
-    .get("#model-User .model-box .pointer:nth-child(1)")
-    .click()
-    .get("#model-User .model-box .model .inner-object")
-    .should("not.exist")
-  })
-
-  it("Model should collapse and expand when toggled clicking arrow", () => {
-    cy.visit(baseUrl)
-    .get("#model-User .model-box .pointer:nth-child(2)")
-    .click()
-    .get("#model-User .model-box .model .inner-object")
-    .should("exist")
-    .get("#model-User .model-box .pointer:nth-child(2)")
+    .get("#model-User .model-box .model-box-control")
     .click()
     .get("#model-User .model-box .model .inner-object")
     .should("not.exist")
   })
 }
-
diff --git a/test/unit/components/operation-tag.jsx b/test/unit/components/operation-tag.jsx
index 773549e6..abe86368 100644
--- a/test/unit/components/operation-tag.jsx
+++ b/test/unit/components/operation-tag.jsx
@@ -44,6 +44,7 @@ describe("<OperationTag/>", function(){
 
     const opblockTag = wrapper.find(".opblock-tag")
     expect(opblockTag.length).toEqual(1)
+    expect(opblockTag.getNode().type).toEqual("h3")
 
     const renderedLink = wrapper.find("Link")
     expect(renderedLink.length).toEqual(1)