UExcel Anatomy and Physiology 5

Question 1

Which bone is NOT part of the axial skeleton?

Accepted Answer

Scapula

Answer

Sternum

Answer

Sacrum

Answer

Hyoid

Question 2

The hypothalamus regulates body temperature primarily by acting as a:

Accepted Answer

Thermostat set point

Answer

Chemoreceptor

Answer

Heat generator

Answer

Sweat gland regulator only

Question 3

In a negative feedback loop controlling thyroid hormone levels, elevated T3 and T4 would cause:

Accepted Answer

Decreased TSH secretion from the anterior pituitary

Answer

Increased TSH secretion from the anterior pituitary

Answer

Increased TRH release from the hypothalamus

Answer

Increased iodine absorption by the thyroid

Question 4

Which type of synovial joint allows the widest range of motion, including flexion, extension, abduction, and rotation?

Accepted Answer

Ball-and-socket joint

Answer

Hinge joint

Answer

Pivot joint

Answer

Saddle joint

Question 5

Which protein complex in the thick filaments of skeletal muscle contains the ATPase activity needed for muscle contraction?

Accepted Answer

Myosin

Answer

Troponin

Answer

Tropomyosin

Answer

Actin

Question 6

The blood-brain barrier is primarily formed by:

Accepted Answer

Tight junctions between capillary endothelial cells

Answer

Microglia

Answer

Oligodendrocytes

Answer

Astrocyte cell bodies

Question 7

Which division of the autonomic nervous system increases heart rate and dilates bronchioles in a 'fight-or-flight' response?

Accepted Answer

Sympathetic division

Answer

Somatic nervous system

Answer

Parasympathetic division

Answer

Enteric nervous system