Question

which is not a layer of the heart wall?

• endothelium
• pericardium
• epicardium
• myocardium

which of the following is not directly involved in the regulation of body temperature?

• thermoreceptors in the central and peripheral nervous system
• the integrating center of the hypothalamus
• the spleen
• effectors, sweat glands and muscles

the 3 types of muscle tissue are:

• skeletal, cardiac, smooth
• skeletal, cardiac, nervous
• smooth, rough, sarcomere
• axial, appendicular, primary action

Explanation:

Analyze layers of the heart wall

The heart wall consists of three layers: the epicardium (outer layer), myocardium (middle muscular layer), and endocardium (inner endothelial lining). The endothelium is the cellular lining of the endocardium. The pericardium is the double-walled sac surrounding the heart, not a layer of the heart wall itself.

Analyze thermoregulation components

Thermoregulation involves thermoreceptors (sensors), the hypothalamus (integrating center), and effectors like sweat glands and skeletal muscles. The spleen functions primarily in blood filtration and immune responses, and is not directly involved in regulating body temperature.

Identify muscle tissue types

The three histological types of muscle tissue in the human body are skeletal muscle, cardiac muscle, and smooth muscle.

Answer:

Question 68

• endothelium
• pericardium (Correct answer)
• epicardium
• myocardium

Question 69

• thermoreceptors in the central and peripheral nervous system
• the integrating center of the hypothalamus
• the spleen (Correct answer)
• effectors, sweat glands and muscles

Question 70

• skeletal, cardiac, smooth (Correct answer)
• skeletal, cardiac, nervous
• smooth, rough, sarcomere
• axial, appendicular, primary action