Extracellular matrix consists of
A) lacunae and lamellae. B) heparin and keratin.
C) ground substance and protein fibers. D) fixed cells and wandering cells.
C
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When you eat a spicy pepper, such as a jalepeño, why do you perceive heat in your mouth?
A. Friction while chewing activates thermoreceptors. B. A chemical within the jalepeño acts as a stimulus for thermoreceptors. C. Chemoreceptors can activate heat sensing parts of the brain. D. The breakdown of chemicals within the pepper causes exothermic reactions in the mouth. E. All of the answer choices are correct.
The membranes that cover the brain and spinal cord are called
A. pleurae. B. the mediastinum. C. meninges. D. the peritoneum.
A primary spermatocyte matures into ________ spermatids having ________ chromosomes
A) millions of; 46 B) four; 23 C) one; 46 D) millions of; 23 E) four; 46
Most muscles that move the thigh originate on the
A. iliotibial tract. B. os coxae. C. sacral spine. D. head of the femur. E. linea alba.