Neurones Study guides, Class notes & Summaries

Describe the events of fertilisation that occur after the acrosome reaction. -Membrane of sperm and egg cell fuse together -cortical granules release contents into zona pellucida -Zona pellucida thickens -Haploid nuclei fuse Explain how phospholipids form a cell surface membrane -Hydrophilic parts associate with water -Hydrophobic parts repel water -a bilayer forms with hydrophobic parts pointing in towards the centre of the bilayer Describe the role of the CFTR protein in e...

Martin Caon Examination Questions and Answers in Basic Anatomy and Physiology Third Edition Chapter 14: Nervous System 14.1 Cells and Action Potential 1. Which word correctly completes the statement: “All motor neurons are…”? a. Interneurons b. Multipolar c. Bipolar d. Unipolar Answer is B: Motor neurones (that innervate muscles) are multipolar. 2. In the peripheral nervous system, which cells form the myelin sheath? a. Ependymal cells b. Schwann cells c. Astrocytes d...

What is the normal body temperature? - Answer- 37 degrees What symptom must be taken very seriously in a pregnant women? - Answer- A headache What does Neutropenic mean? - Answer- Low immunity What is sepsis? - Answer- A reaction to a infection causing the body to attack its own organs and tissues What is anaphylaxis? - Answer- Severe allergic reaction What is AAA? - Answer- abdominal aortic aneurysm What is rigor? - Answer- Violent shivering that occurs with a high fever that ...

Outline how a negative feedback mechanism works (4) Oct/Nov 2017 V1 - 1 change in factor away from, the norm / set-point 2 detected / sensed by, receptor 3 hormone released or (nerve) impulse sent 4 (hormone / impulse) reaches, target organ / effector ; 5 (effector) performs corrective action- counteracts change 6 (factor) returns to, norm / set-poin Describe the role of the nervous system in the control of blood glucose concentration (4) Oct/Nov 2017 V1 - 1 hypothalamus detects cha...

BTEC Applied Science Unit One Biology 128 Questions with Answers What is the function of the mitochondria? - CORRECT ANSWER cellular respiration What is the function of the ribosomes? - CORRECT ANSWER protein synthesis What is the function of the smooth endoplasmic reticulum? - CORRECT ANSWER Synthesis and transport of lipids and carbohydrates What is the function of the Golgi apparatus? - CORRECT ANSWER Modified and packaged proteins into vesicles for transport What is the functi...

GCSE AQA Biology Homeostasis Practice Test Questions With Complete Solution What is homeostatis? - CORRECT ANSWERS The regulation of the conditions in our body maintaining stable internal environment What does it do? - CORRECT ANSWERS Responds to any change in internal or external conditions What are the 3 main components in automatic control systems? - CORRECT ANSWERS Receptors, coordination centres and effectors Wh...

BTEC Applied Science Unit 1 Biology Exam 118 Questions with Answers Describe the function of the nucleolus - CORRECT ANSWER Produces ribosomes and RNA Describe the function of the cell wall - CORRECT ANSWER Provides rigidity and protection to the cell Describe the function of the chloroplasts - CORRECT ANSWER Site of photosynthesis as they contain chlorophyll Describe the function of the plasmodesmata - CORRECT ANSWER A channel through the cell wall the allows transport of materials ...

Draw the reflex arc. - ANSWER What is homeostasis? - ANSWER Homeostasis involves physiological control systems that maintain the internal environment despite changes in the external environment of an organism within restricted limits. What factors does our internal environment consist of? - ANSWER Temperature, water potential, pH and blood glucose levels, water levels, etc. Why is homeostasis important? - ANSWER If body temperature and blood pH change too much then enzymes will becom...

What is homeostasis? - ANSWER-The maintenance of a constant internal environment. What is a stimulus? - ANSWER-A change in your environment than requires a response. e.g Light, sound, touch, pressure, pain, chemical or temperature. What do the receptors do? - ANSWER-Detect the stimulus or change in environment. What happens after the receptors? - ANSWER-Receptors send messages to the CNS via the sensory neurone. What makes up the central nervous system? - ANSWER-The brain or spinal c...

AQA A Level Biology : Year 2- Nervous Coordination Graded A What is the value of the resting potential of a neurone? Why is the resting potential of a neurone negative? -70mV There are more positive ions outside the cell than inside How is the resting potential maintained? actively transports 3 Na+ out for ever 2 K+ into the neurone (ATP Hydrolysed) Sodium-potassium pump Membrane more permeable to K+ and less permeable to Na+ What happens if the sodium ion channels rema...