Unit Test - Nervous, Cardio, Resp. and Digestive Systems

Impulse conduction is fastest in neurons that are:

• myelinated
• sensory
• motor
• unmyelinated

The neuron processes that normally receive incoming stimuli are called and is identified by letter ______.

• Nucleus, F
• Microglia, C
• Dendrites, A
• Axons, E

Identify B.

• Neurolemma
• Microglia
• Dendrites
• Axons

Which of the following brain structures is the Medulla Oblongata?

• A
• B
• C
• D

An action potential:

• involves the movement of ions across an axon which depolarizes the membrane
• involves the movement of neurotransmitters across the axon and results in a polarization of the membrane.
• is initiated by potassium ion movements
• only takes place at the neurons synaptic cleft.

The aorta is identified by letter ___.

Which of the following is the bicuspid valve (also called the mitral or left AV valve)?

• C
• D
• E
• F

The chordae tendineae is identified by letter ___.

• R
• I
• B
• S

The right ventricle is identified by letter ___.

• C
• H
• Q
• N

Which of the following areas received blood directly from the pulmonary veins?

• lungs
• right atrium
• right ventricle
• left atrium