Floating ribs of the thoracic cage are

Correct Answer: C

Rationale: The correct answer is C: 11, 12 ribs. Floating ribs are ribs that do not have a direct attachment to the sternum. Ribs 11 and 12 are considered floating ribs because they do not attach to the sternum or cartilage of other ribs, only to the vertebrae in the back. Choices A and B are incorrect because ribs 1-10 are not considered floating ribs. Choice D is incorrect because ribs 11 and 12 are indeed the floating ribs of the thoracic cage.

Correct Answer: B

Rationale: The correct answer is B: Plantar flexion. Plantar flexion refers to the motion of extending the foot downward towards the ground, like when pointing the toes or pressing the gas pedal. This action is mainly controlled by the calf muscles, particularly the gastrocnemius and soleus. Dorsiflexion (A) is the opposite motion, where the foot is flexed upward towards the shin. Rotation (C) involves turning around an axis and is not relevant to this specific movement. Flexion (D) refers to the bending of a joint, not the extension of the foot downward. In summary, plantar flexion is the correct answer because it accurately describes the motion of extending the foot downward, while the other choices do not match the described movement.

Correct Answer: C

Rationale: The correct answer is C because the menstrual cycle is the female body's way of preparing for pregnancy through ovulation and the shedding of the uterine lining if fertilization does not occur. Choice A is incorrect as menstruation is not directly related to giving birth. Choice B is incorrect as milk production occurs after childbirth, not during the menstrual cycle. Choice D is incorrect as the menstrual cycle is not related to preparing for old age, but rather for reproductive purposes.

Correct Answer: B

Rationale: The glands of Moll are a type of apocrine sweat glands located in the eyelids. They secrete a clear fluid that helps lubricate the eyes. The correct answer is B because apocrine glands are associated with hair follicles and produce a thicker secretion compared to eccrine sweat glands. Endocrine glands (A) secrete hormones into the bloodstream, oil glands (C) are associated with hair follicles and produce sebum, and sebaceous glands (D) are also oil-producing glands but are different from the glands of Moll.

Correct Answer: B

Rationale: The correct answer is B: luteinizing hormone. Luteinizing hormone stimulates the Leydig cells in the testes to produce testosterone. Inhibin (A) regulates the production of FSH, not testosterone. Follicle-stimulating hormone (C) is responsible for sperm production in the testes, not testosterone. Thyroid-stimulating hormone (D) does not play a role in the production of testosterone.