c) How does one nerve cell communicate with another? - Nerve cells communicate with one another through neurotransmitters. 2. a) Explain what neurotransmitters are? - Neurotransmitters are chemical messengers that cross the synaptic gaps between neurons. When released by the sending neuron, neurotransmitters travel across the synapse and bind to receptor sites on the receiving neuron, thereby influencing where that neuron will generate a neural impulse.
The main voice organs that the air pressure system is contained in are the diaphragm, chest muscles, ribs, abdominal muscles. In the Vibratory system, vocal folds vibrate, changing air pressure to sound waves producing "voiced sound," frequently described as a "buzzy sound" the frequency of the vibrations depend on the pitch sang. The vibratory system is contained inside of the voice box also known as the larynx. The resonating system changes the "buzzy sound" into a person's recognizable voice. The resonating system is located in the pharynx, oral cavity, and nasal cavities.
ANS -B: The buccal branch of the facial nerve is the motor fo r the buccinator muscle. 1 8. ANS -B : The internal jugular vein and the subclavian vein unite to form the brachiocephalic vein. The right and the left b rachiocephalic vein unite to form the superior vena
SENSATION Sensation is defined as the process by which our sensory receptors and nervous system receive and represent stimulus energies from our environment. The study of sensation is concerned with the initial contact between organisms and their physical environment. It focuses on describing the relationship between various forms of sensory stimulation (including electromagnetic, sound waves, pressure) and how these inputs are registered by our sense organs (eyes, ears, nose, tongue and skin). The process through which the senses pick up visual, auditory, and other sensory stimuli and transmit them to the brain; sensory information that has registered in the brain but has not been interpreted. Sensation is the process by which our senses gather information and send it to the brain.
Outline the body’s response to stress (6 marks) There are two types of stress: acute and chronic stress. Acute stress (short-term stress) causes the body to respond through a process called the sympthomedullary pathways. This immediate response is achieved because of the hypothalamus’s direct link to the nervous system which causes the activation of the sympathetic nervous system (SNS). This is a branch from the autonomic nervous system. The SNS also regulates the sympathetic adrenal medullary system (SAM).
Clear intro to topic and essay Q The nervous system is the body’s internal electrochemical communications network. Its main parts are the brain, spinal cord and the nerves. The brain and the spinal cord form the central nervous system, which is the body’s chief controlling and coordinating centre and billions of long neurones, many grouped as nerves, make up the peripheral nervous system, transmitting nerve impulses between the central nervous system and other regions of the body. Each neuron has three parts, a cell body, branching dendrites that receive chemical signals from other neurons and a tube-like axon that conveys these signals as electrical impulses. There are two types of neurons: sensory neurons and motor neurons.
The sound wave then enter into the eardrum where vibrations are matched. The eardrum sends the vibration waver to the middle ear whose job is to transfer sound waves to the hammer, the anvil, and the
• Sensory organs function as receptors and receive the stimuli, then it sends nerve impulses to the related effectors. 3. How does the brain use the senses to search/find stimuli in the environment? • Stimuli from the environment are transformed into neural signals which are then interpreted
Referred pain is when internal organs cause another part of the body to feel pain. For example when a heart attack it causes arm pain this is how it can be dangerous because the individual may not know where the arm pain is coming from. 2. Explain why olfaction and gustation are considered "chemical" special senses (think of how these two senses work). Explain the importance of hair cells with the sense of hearing and equilibrium.
Inside a speaker: 1. Cone 2. Electromagnet (coil) 3. Permanent magnet The frequency of the vibrations governs the pitch of the sound produced, and their amplitude affects the volume – turn your stereo up high enough and you might even be able to see the diaphragm covering the cone move. To reproduce all the different frequencies of sound in a piece of music faithfully, top quality speakers typically use different sized cones dedicated to high, medium and low frequencies.