Ques: Q: Where are hormones released? Read this paragraph and choose the correct option from the provided answers: Signaling molecules can belong to two broad groups. Neurotransmitters are released at synapses, whereas hormones are released into the bloodstream. These are simplistic definitions, but they can help to clarify this point. Acetylcholine can be considered a neurotransmitter because it is released by axons at synapses. The adrenergic system, however, presents a challenge. Postganglionic sympathetic fibers release norepinephrine, which can be considered a neurotransmitter. But the adrenal medulla releases epinephrine and norepinephrine into circulation, so they should be considered hormones. What are referred to here as synapses may not fit the strictest definition of synapse. Some sources will refer to the connection between a postganglionic fiber and a target effector as neuroeffector junctions; neurotransmitters, as defined above, would be called neuromodulators. The structure of postganglionic connections are not the typical synaptic end bulb that is found at the neuromuscular junction, but rather are chains of swellings along the length of a postganglionic fiber called a varicosity (Figure 15.5). Choices: - liver - lungs - brain - bloodstream A:
Ans: bloodstream

Ques: Q: In frequency, the larger the air column, the larger the what? Read this paragraph and choose the correct option from the provided answers: a) The water forms the bottom of the tube and thus where the node of the wave will be. Thus the air column is where the sound wave can exist. The larger the air column, the larger the wavelength. Frequency is inversely proportional to wavelength, thus the tube with the smallest air column will have the highest frequency. So the answer is tube C. Choices: - mass - gravity - absorption - wavelength A:
Ans: wavelength

Ques: Q: The vagina starts at the vulva and ends where? Read this paragraph and choose the correct option from the provided answers: The vagina is a tube-like structure about 9 centimeters (3.5 inches) long. It begins at the vulva and extends upward to the uterus. It has muscular walls lined with mucous membranes. The vagina has two major reproductive functions. It receives sperm during sexual intercourse, and it provides a passageway for a baby to leave the mother's body during birth. Choices: - testicle - clitoris - pelvic brim - the uterus A:
Ans: the uterus

Ques: Q: Motors are the most common application of magnetic force on current-carrying wires. motors have loops of wire in this? Read this paragraph and choose the correct option from the provided answers: 22.8 Torque on a Current Loop: Motors and Meters Motors are the most common application of magnetic force on current-carrying wires. Motors have loops of wire in a magnetic field. When current is passed through the loops, the magnetic field exerts torque on the loops, which rotates a shaft. Electrical energy is converted to mechanical work in the process. (See Figure 22.34. Choices: - electrical circuit - capacitors - spark plugs - magnetic field A:
Ans:
magnetic field