In humans, aniridia, a type of blindness, is due to a dominant allele a. migraine headaches are due to another dominant allele m. if a man who suffers from both conditions (aamm) marries a woman who suffers from both (aamm), what are the chances of an offspring expressing both traits?
cortex, in plants, tissue of unspecialized cells lying between the epidermis (surface cells) and the vascular, or conducting, tissues of stems and roots. cortical cells may contain stored carbohydrates or other substances such as resins, latex, essential oils, and tannins.
rough er is called rough because it has ribosomes attached to its surface. the double membranes of smooth and rough er form sacs called cisternae. protein molecules are synthesized and collected in the cisternal space/lumen. when enough proteins have been synthesized, they collect and are pinched off in vesicles.
the correct order would be
sensory receptors in the arteries detect low oxygen levels.
sensory neurons generate an impulse.
the central nervous system relays an impulse to certain brain regions.
the brain sends signals through motor neurons.
isabel's breathing rate increases.
the working of the nervous system can be summarized as:
the receptors receives the stimulus which then send signals to the brain with the of sensory neurons.
for example, sensory receptors in the arteries detect the low oxygen levels after which sensory neurons send the signals to the brain.
the stimulus or information is processed in a specified region of the brain which then sends the signals to the effector organ via motor neurons.
the action or reaction is generated at the effector site such as an increase in the breathing rate of isabel in this case.
the core of the sun is so hot and there is so much pressure, nuclear fusion takes place, hydrogen is changed to helium. nuclear fusion creates heat and photons. when the heat reaches the earth it warms the molecules of the atmosphere, and they warm other molecules and so on.