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Nervous System
This category is for questions about the mechanical and chemical process of reactions to internal and external stimuli, ranging from the brain down to the spinal cord, and all nerves, cells and tissues in between.
3,047 Questions
What happen if a persons sensory nerves are impaired?
This person's senses - sight, smell, taste, touch, hearing, or spatial reasoning - is no longer functioning normally. This impairment can range from simply needing reading glasses to wearing a hearing aid to being completely deaf or blind. These senses are generally poorer than those of a nonimpaired person. The effects of this impairment vary from person to person.
Why cant i fully control the movement of my penis?
Because your penis is controlled by your autonomic nervous system, not by conscious thought. You also do not fully control the eating of your heart. The autonomic nervous system is a division of the peripheral nervous system that supplies smooth muscle and glands, and thus influences the function of internal organs. The autonomic nervous system is a control system that acts largely unconsciously and regulates bodily functions such as the heart rate, digestion, respiratory rate, pupillary response, urination, and sexual arousal.
What happens in the body when you eat something cold?
Thermoreceptors in the nerve cells of the mouth respond to temperature of objects. When these receptors are activated, ion channels are opened and action potentials are sent to the central nervous system. Cool objects/food activates these thermoreceptors. However, if something that is too cold enters the mouth, nociceptors will be activated. These receptors register pain and inform the central nervous system that the object is harmful.
Helmholtz's experiment with the frog's nerve indicated that the speed of the nervous impulse was?
Conduction velocities are specific to each person and depend largely on an axon's diameter and the degree to which that axon is myelinated. Some myelinated neurons conducting at speeds up to 120 m/s (432 km/h).
Diaphragm contractions are regulated by what nerve?
The diaphragm's contractions are regulated by the phrenic nerve. A diaphragm are the muscle that inserts on the central tendon.
What is used to record the activity of large groups of cortical neurons just below the skull?
electroencephalograph
The sympathetic division of the autonomic nervous system is responsible for preparing you body for the fight or flight response.
The role of the hypothalamus.Combination of the brain and nervous as well as muscular and cardiovascular system. The brain initiates the process and everything becomes innate from there...the nervous system delivers the fight or flight signals, the heart beats faster and the muscles tense in order to release energy and react quicker to the organism's surroundings
Adrenaline prepares your body for the fight response.
It's actually a take on an old nursery rhyme. Its a play on words and should not be read;
Twelve pairs hanging high twelve men riding by each man grabs a pear but leave a dozen hanging there. How is this possible?
Its twelve pairs of pears and each rider takes one pear, leaving the other 12 there...a dozen.
muscular and skeletal
^^ FAIL.
The two organ systems that control and coordinate the 50 trillion cells in a human are actually the nervous system, and endocrine system. 100% positive. Go anatomy and physiology kids:)
What is the secretory product of the lacrimal gland?
Tears are secreted by the lacrimal glands.
tears
The secretions of the lacrimal gland are more commonly known as TEARS. The lacrimal gland is what produces the tears that lubricate and clean your eye.
Tears
What is the difference between motor nerve and sensory nerve and association or connector nerves?
- Motor neurons move signals from the central nervous system to a central organ or point, which in this case are muscle and gland cells. This signal makes the cells contract and allow for physical movement (locomotion and other movements such as from the face or the neck). Motor nerves contain axons of somatic and branchial motoneurons. Sensory neurons move signals from the central organ or point to the central nervous system. They receive sensory stimuli and sends the information to the CNS in order to experience how something feels and if it is painful, smooth, rough etc. They are made of sensory fibers: mechanoreceptors fibers that sense body movement and pressure placed against the body and nociceptor fibers that sense tissue injury.
- Association Nerves are neurons found in the brain and spinal cord that conduct impulses between neurons such as from afferent to efferent neurons. Called also interneurons. Connector Nerves process information that is being sent between the body, brain and spinal cord. The connector neuron
