Page 1 of 5 The Brain and the Nervous System The human brain and the nervous system are essential for human life. They run the autonomic and conscious processes of the body. All of the body organs and processes independent that not conscious of are controlled by the brain. Being one of the most important of the body when issues there must be immediate solutions or the entire body will shut down. The brain is fragile and has huge functions in the body so it must be taken care of‚ but if not
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Introduction The heart is an extremely important organ in the human body‚ and it must be able to adjust the heart rate for when a person is resting or for when a person is running. Heart rate is defined as the number of heartbeats per unit of time‚ usually per minute (Medicine-Net). The heart rate is based on the number of contractions of the ventricles. The pulse is defined as a bulge of an artery from waves of blood that course through the blood vessels each time the heart beats (Medicine-Net)
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Chapter 9 Motivation and Emotion MULTIPLE CHOICE 1. Motives activate behavior and propel the organism a.|to flee.|c.|toward goals.| b.|to respond.|d.|to drives.| ANS: C DIF: 2 REF: 9-188 OBJ: 1 MSC: TYPE: Factual 2. The study of motivation is an attempt to understand __________ a behavior occurs. a.|why|c.|when| b.|how|d.|all of these| ANS: A DIF: 1 REF: 9-188 OBJ: 1 MSC: TYPE: Factual NOT: BTC 3. Psychologists define hypothetical states that activate behavior and propel one towards
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CENTRAL NERVOUS SYSTEM STIMULANTS CENTRAL NERVOUS SYSTEM STIMULANTS Definition Stimulants are a substance which tends to increase behavioral activity when administered. Primary action of a diverse group of pharmacologic agents – adverse effect associated with many drugs. Signs and symptoms * Elevate Mood * Increase Motor Activity * Increase Alertness * Decrease need for Sleep *In case of overdose lead to convulsion and death. Mode of Action * Block neurotransmitters
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It is amazing how some systems in our body works together in situations to help us to have the ability to react and be alert of our surroundings such as being in danger or suffering from stress which is an important factor of many health problems. The two systems that I am referring to are the endocrine and nervous systems. they help to regulate our bodies back to our normal state to help to maintain healthy functioning. There are two systems that work with one another to signal the brain when something
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peripheral nervous system (PNS) are myelinated. Myelin is a spiral sheet of cell membrane wrapped around the axon. In the CNS‚ myelin is produced by oligodendroglial cells and in the PNS by Schwann cells. Each oligodendrocyte makes multiple segments of myelin that wrap around many axons. Each Schwann cell makes one segment of myelin. This is one reason why peripheral myelin regenerates more efficiently. Nodes of Ranvier are points of discontinuity between adjacent myelin sheaths in which the axon is
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Introduction In this lab‚ I looked at how exercise affects a person’s heart rate (BPM)‚ systolic pressure‚ diastolic pressure‚ and Mean Arterial Pressure (MAP). Heart rate is measured by beats per minute while systolic and diastolic pressure are measured by millimeters of Mercury. I found the MAP by the following equation‚ MAP= Diastolic Pressure + ⅓(Systolic-Diastolic). We found out that heart rate and systolic pressure were highest right after and during exercise‚ while diastolic pressure and
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The nervous system is one of the smallest yet one of the‚ if not the most‚ complex systems in the human body. It can be broken down into two main subdivisions‚ the central nervous system (CNS) and the peripheral nervous system (PNS). The central nervous system contains about 85 billion neurons and includes the spinal cord and brain. It is considered the control center of the body and processes all types of incoming sensory information. The peripheral nervous system is composed of all the other tissue
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exoskeleton. The heart is located in the upper portion of the cephalothorax‚ which is located just in front of the first abdominal segment (UNT Lab Manual‚ 2017). We can measure the heart rate of the crayfish by measuring the change of the impedance of the circuit that is created by placing fine wires on
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The Nervous System By: Brooklynne Harris Scenario A loud crashing sound causes everyone in the room to quickly turn their heads toward the source of the noise. Describe the path of the signal through the human nervous system from initial stimulus of sound to the response of turning the head. Crash and then turn of the head The Journey The loud sound that the person heard is the stimulus. In order to hear a sound‚ sound waves have to be generated and sent to the cochlea in the inner ear. From
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