What cells secrete testosterone?
A. Sertoli cells
B. Spermatocytes
C. Spermatids
D. Leydig cells
Select your answer:
Topics:
Health and Diseases Erythrocyte Disorders Blood Groups Inhalation Injury Skin Appendages Multicellular Organisms Radiation and Health Pathology Inflammation Wellness Vocabulary MEDICINE Oral Hygiene Anatomy Respiratory System The Ankle and Lower Leg Injury Musculoskeletal FitnessOther quiz:
Eye › ViewSeeing movement in your peripheral vision is primarily caused by your…
A. lens.
B. cones.
C. rods.
D. iris.
Musculoskeletal System › View
Which of the following describes how muscles and bones work together to create movement?
A. Muscles are attached to bones by tendons. When a muscle contracts, it pulls on the bone, causing bending at a joint. To reverse the action at the joint, contraction of an opposing group of muscles occurs.
B. Muscles are attached to bones by ligaments. When a muscle contracts, it pulls on the bone, causing bending at a joint. To reverse the action at the joint, contraction of an opposing group of muscles occurs.
C. Muscles are attached to bones by tendons. When a muscle contracts, it pulls on the bone, causing bending at a joint. To reverse the action at the joint, the same muscle group extends, causing movement in the opposite direction.