In the context of the neural impulse, the membrane that encases the axon is called semipermeable because FLUIDS CAN SOMETIMES FLOW INTO OR OUT OF IT.
Semi permeability is the ability of the membrane to allow certain substances, not all, to pass through it.
The male reproductive system is designed to make sperm or male gametes and is adapted to provide for the delivery of these gametes to the female to allow for fertilization. It consists of:1. Testes- produces sperm and the hormone testosterone2. Scrotum- pouch enclosing the testes keeping the sperm at an optimum temperature.3. Vas deferens- tube that carries sperm away from the testes.4. Prostate gland- adds lubricating and other fluids to the sperm.5. Urethra- tube through the penis carrying sperm to the outside of the body.<span>6. Penis- adaptation for internal fertilization of the female.</span>
Answer:
D penguins have wings shaped for swimming
Explanation:
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<span>adequacy, balance, calorie control, moderation, variety, and nutrient density</span>
Answer:
- The six essential nutrients are vitamins, minerals, protein, fats, water, and carbohydrates.
-The digestive system converts the foods we eat into their simplest forms, like glucose, amino acids or fatty acids.
- The function of the excretory system to remove wastes from the body.
-The organs of the urinary system include the kidneys, renal pelvis, ureters, bladder and urethra.
-The excretory system works with the endocrine system to help maintain homeostasis. Chemical messengers called hormones signal the kidneys to filter more or less water or salt, depending on the levels of water and salt in the body.
Explanation: