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Human Anatomy
week 6-12
| Question | Answer |
|---|---|
| Which abdominal muscle has horizontal fibers? | Transversus abdominis |
| Which axial muscle rotates the head to the opposite side? | Sternocleidomastoid |
| Which muscle is the strongest forearm flexor? | Brachialis |
| Which muscle is the prime mover for hip extension when rising from sitting? | Gluteus maximus |
| Which cell maintains the blood–brain barrier? | Astrocyte |
| Which cell myelinates neurons in the CNS? | Oligodendrocyte |
| Which CNS structure is responsible for coordinating motor patterns like balance and posture? | Cerebellum |
| Which CNS area contains the vital autonomic centers for heart rate and breathing? | Medulla oblongata |
| Which division of the PNS carries signals from the body to the CNS? | Sensory (afferent) division |
| Which type of neuron cell body is found in dorsal root ganglia? | Unipolar sensory neurons |
| Which ANS division has long preganglionic and short postganglionic fibers? | Parasympathetic |
| Which neurotransmitter is released by all ANS preganglionic neurons? | Acetylcholine (ACh) |
| Which general sense receptor detects deep pressure and vibration? | Pacinian (lamellated) corpuscle |
| Which fibers transmit fast, sharp pain? | Myelinated A-delta fibers |
| Which structure of the inner ear contains hair cells for rotational (angular) equilibrium? | Semicircular canals |
| Which retinal cells enable color vision? | Cones |
| Which feedback mechanism controls most endocrine hormone release? | Negative feedback |
| Which two hormones regulate blood calcium in opposite ways? | Calcitonin ↓ and PTH ↑ |
| Which gland depends on iodine to make its hormones? | Thyroid gland |
| Which endocrine gland controls the pituitary gland? | Hypothalamus |
| Which formed element is produced by megakaryocytes? | Platelets (thrombocytes) |
| Which plasma protein is essential for blood clot formation? | Fibrinogen |
| Which heart valve prevents backflow into the left ventricle? | Aortic semilunar valve |
| Which part of the heart delays the electrical impulse to allow ventricular filling? | AV node |
| Which vessels have the greatest impact on systemic blood pressure? | Arterioles |
| Which layer of a blood vessel contains smooth muscle? | Tunica media |
| Which vessel carries oxygenated blood from the lungs to the heart? | Pulmonary veins |
| Which circuit supplies blood to the myocardium itself? | Coronary circulation |
| Which lymphatic organ filters blood, not lymph? | Spleen |
| Which structure drains lymph from the entire lower body and left upper body? | Thoracic duct |
| Which innate immune cells kill virus-infected cells without prior sensitization? | Natural killer (NK) cells |
| Which antimicrobial proteins form pores in microbial membranes? | Complement proteins |
| Which cells are responsible for antibody-mediated immunity? | B cells (plasma cells) |
| Which T-cell type directly destroys infected host cells? | Cytotoxic T cells (CD8+) |
| Which respiratory structure is the primary site of gas exchange? | Alveoli |
| Which cartilage of the larynx prevents food from entering the airway during swallowing? | Epiglottis |
Created by:
seeratsandhu
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