1. Which part of your brain is most responsible for initiating motor signals tha

Question

1. Which part of your brain is most responsible for initiating motor signals that allow you to manipulate the computer in order to select the correct answer to this question?

A. Wernicke's area

B. Cerebellum

C. Thalamus

D. Primary motor cortex

E. Primary somatosensory cortex

2.Which of the following is(are) true during isovolumetric ventricular contraction?

I. All four heart valves are closed.

II. Ventricular systole is just beginning.

III. The volume of blood in the ventricles is increasing.

IV. The volume of blood in the ventricles is equal to the end diastolic volume (EDV).

A. I only

B. I and II only

C. II and III only

D. III and IV only

E. I, II, and IV only

3. Which of the following would occur after baroreceptors detected a moderate drop in blood pressure (a deviation from homeostasis)?

A. The cardiovascular center would increase parasympthetic stimulation to the heart

B. The cardiovascular center would decrease sympathetic stimulation to vasomotor nerves

C. Systemic tissues would begin to generate more CO2

D. The cardiovascular center would decrease sympathetic stimulation to the heart

E. None of the above. They are not mechanisms for reversing a drop in blood pressure.

4. Which of the following substances generally cannot move out of a systemic capillary (continuous or fenestrated capillary)?

A. plasma proteins like fibrinogen and albumin

B. carbon dioxide

C. glucose

D. amino acids

E. None of the above. They may all freely pass out of a systemic capillary.

5. Which of the following statements is/are true?

I. Blood is a connective tissue and plasma is the extracellular matrix.

II. Plasma is mostly water with various dissolved solutes in it.

III. New formed elements are produced in the liver.

IV. The primary function of platelets is to kill foreign cells (e.g., bacteria).

V. Erythrocytes do not have nuclei.

A. II only

B. I and II only

C. I, II, and III only

D. I, II, and IV only

E. I, II, and V only

Explanation / Answer

1) The part of brain that is responsible for initiating the motor signals that allow us to manipulate the computer is known as primary motor cortex (option D).

Wernicke's area is responsible for comprehension of speech. Cerebellum is involved in coordination of motor activities and maintainance of balance. Thalamus is the integerating center. Primary somatosensory cortex is involved in the processing of sensory information.

Please post other questions separately.

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